
- Electronics Projects
- 1.5v to 220v AC simple inverter
- Build Simple AM Radio receiver at home
- Simple Uninterruptible Power Supply (UPS) Circuits
- Single Transistor Amplifier Circuit
- 3.7v Lithium Battery Level Indicator
- LED Chaser using transistors
- Electronics Projects for Beginners
- Simple Latch Circuit Using Transistors
- DC to AC Power Converter circuit feature working
- Fire Alarm Circuit using Transistor
- Two Transistor Amplifier
- Laser Security System
- Music Operating Dancing LEDs light
- Volts Booster Circuit Using Ferrite ore transformer
- Touch switch circuit using Transistor
- Two transistor FM transmitter project
- LED Flasher Using Timer IC 555
- DC Voltage Power Supply Using The LM317
- Electronic Mosquito Repellent Circuit
- Light Dimmer Circuit 1000 Watts Using BT139
- Non-Contact Voltage Detector by using transistor
- 4 volts simple inverter project: explanation
- Flashing Police Lights Circuit
- Light Dependent Resistor, its types and applications
- 100 watts inverter circuit working and applications
- Stereo Audio Amplifier 5W Circuit using TEA 2025 IC
- Small High Volts using 2Sc 1815 transistor
- Electronic Doorbell Circuit using a 555 and CD4017
- Touch On Touch Off Switch Circuit Using 555 timer
- LM386 Audio Amplifier Circuit
- IC 4440 Amplifier Circuit
- Neon Lamp Circuits Working and Application
- Low Power Audio Amplifier Using integrated circuit
- Voltage Regulator Circuits using Transistor and Zener Diode
- Water Level Indicator Circuit Using Transistor
- LED Chaser using CD4017 IC
- Motion Sensor Light Switch
- Melody Generator Using IC um66
- Water Level Indicator Using IC
- Led Light to 220v AC
- LiFi Data Transfer System, WiFi vs LiFi
- How to Connect a CAR Battery | Polarity Checker
- Voltage Level Indicator Circuit
- Security Alarm Using PIR Sensor
- Battery Level Indicator Using LM 3914
- Single Transistor FM Transmitter circuit
- Different types of Capacitor
- Light Emitting Diode (LED) Types of LEDs
- Different Types of Relays
- Piezo buzzer features equivalent
- Clap Switch : Circuit and Its Working
- Different Types of diode, working and features
- PC817 Optocoupler Pinout, Equivalent, Features and applications
Voltage Level Indicator Circuit
In this project, we are going to show you how to design a simple Battery voltage Level Indicator Circuit using very simple available components.
Battery voltage level indicator indicates the status of the current of the battery just by glowing LEDs in series(Red, Yellow, Green). Res LED Indicates 2 volts, 2nd red LED indicates that the current is now 4 volts, Yellow LED indicates the current is now 7 volts and Green LED indicates that the current is now 12 volts in the battery. In this circuit, we have 1k resistors to control the current in the LED’s you can use a 560-ohm resistor with the last two LEDs because the last two LEDs has on the top level of all LEDs which is why you can use fewer resistors. This project explains to you how to design battery-level indicators with a few components. You can use this circuit to check the car battery or inverter. This circuit helps you to increase the lifetime of the battery.
Voltage Level Indicator Circuit adjustable
you can change this circuit easily by increasing and decreasing the leds and resistors. If you want to change this circuit as adjustable then please use a variable with it as shown in the diagram.
In this circuit, I have used just a 5 k potentiometer to adjust the measurement of volts. In this way, this circuit becomes more flexible now you can measure even to 40 volts.
Voltage Level Indicator Circuit Working Principle
The current level indicator circuit work with the help of roisters as well as LEDs. Resistors control current in series with the help of an LED As a current passes through the 1st LED’s current value slows down and that is why the 2nd LED glows on more volts as compared to the 1st LED and in this way 3rd LED required more volts to glow as compare to 2nd led. In this way, the next LED required more volts to glow as compared to the previous. we are using 1 k resistors only for protecting LEDs because LEDs can bear only 1.5 to 3V.
Voltage Level Indicator Using Zener Diode
In this circuit, we are going to show you how to build a voltage level indicator with zen-er diodes. In this project, we have used 4 zen-er diodes of different powers to make a perfect voltage level indicator.
A normal diode acts as a short circuit in the forward bias condition while in the reverse bias condition, it acts as an open circuit. A Zener Diode has a breakdown when a certain voltage level is reached. The voltage that passes through the Zener diode is called the breakdown voltage of the zener diode. If a zener has a breakdown voltage of 5.1 V, after 5.1 V or greater is applied to it, it will cross the voltages that power on a load. In this circuit, the type of zener diode we have used are:
- 1N4728: 3.3V
- 1N4734: 5.6V
- 1N4739: 9.1V
- 1N4742: 12V
According to Zener Diode 1st LED will glow at 3.3v 2nd LED will glow at 5.6v 3rd Led will glow at 9.1v and the last Led will glow at 12.1 volts. In this way, you can increase the no of zener and no of LEDs to make it more suitable.
Zeners Diodes with Their Breakdown Powers
S.R | Voltages | |
---|---|---|
3.3v | ||
3.6v | ||
3.9v | ||
4.3v | ||
4.7v | ||
5.6v | ||
6.2v | ||
6.8v | ||
7.5v | ||
8.2v | ||
9.1v | ||
10v | ||
11v | ||
12v | ||
13v | ||
18v |
These are different zener diodes you can use as you want. They all have different breakdown voltages, so they can set a different voltage for the voltage level indicator circuit.